The majority of residents (55.8%) are of Australian birth, with other common census responses being England (31.8%), Scotland (2.1%) and Italy (2.1%).[1]

The age distribution of Hillier residents is skewed higher than the greater Australian population. 86.7% of residents were over 25 years in 2006, compared to the Australian average of 66.5%; and 13.3% were younger than 25 years, compared to the Australian average of 33.5%.[1]